[INFO] fetching crate doublets-decorators 0.1.0-alpha.3...
[INFO] testing doublets-decorators-0.1.0-alpha.3 against 1.75.0 for beta-1.76-1
[INFO] extracting crate doublets-decorators 0.1.0-alpha.3 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate doublets-decorators 0.1.0-alpha.3 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate doublets-decorators 0.1.0-alpha.3
[INFO] finished tweaking crates.io crate doublets-decorators 0.1.0-alpha.3
[INFO] tweaked toml for crates.io crate doublets-decorators 0.1.0-alpha.3 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded doublets v0.1.0-pre+beta.15
[INFO] [stderr]   Downloaded platform-treesmethods v0.1.0-aplha.2
[INFO] [stderr]   Downloaded platform-data v0.1.0-beta.3
[INFO] [stderr]   Downloaded platform-mem v0.1.0-pre+beta.2
[INFO] [stderr]   Downloaded platform-num v0.1.0-aplha.1
[INFO] [stderr]   Downloaded leak_slice v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5b23e89fff1243e9bef964ea22af484873d5ecc276473eea92b649609df2c4e8
[INFO] running `Command { std: "docker" "start" "-a" "5b23e89fff1243e9bef964ea22af484873d5ecc276473eea92b649609df2c4e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b23e89fff1243e9bef964ea22af484873d5ecc276473eea92b649609df2c4e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b23e89fff1243e9bef964ea22af484873d5ecc276473eea92b649609df2c4e8", kill_on_drop: false }`
[INFO] [stdout] 5b23e89fff1243e9bef964ea22af484873d5ecc276473eea92b649609df2c4e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0747aaedcb7a0cee356b8d7e7079b1da54aaff2dfd99b7fefe8e97fffdecb91e
[INFO] running `Command { std: "docker" "start" "-a" "0747aaedcb7a0cee356b8d7e7079b1da54aaff2dfd99b7fefe8e97fffdecb91e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling proc-macro2 v1.0.75
[INFO] [stderr]    Compiling rustix v0.38.28
[INFO] [stderr]    Compiling linux-raw-sys v0.4.12
[INFO] [stderr]    Compiling funty v2.0.0
[INFO] [stderr]    Compiling leak_slice v0.2.0
[INFO] [stderr]    Compiling smallvec v1.11.2
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling platform-num v0.1.0-aplha.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/platform-num-0.1.0-aplha.1/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(step_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/platform-num-0.1.0-aplha.1/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(trait_alias)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/platform-num-0.1.0-aplha.1/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(step_trait)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `platform-num` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0747aaedcb7a0cee356b8d7e7079b1da54aaff2dfd99b7fefe8e97fffdecb91e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0747aaedcb7a0cee356b8d7e7079b1da54aaff2dfd99b7fefe8e97fffdecb91e", kill_on_drop: false }`
[INFO] [stdout] 0747aaedcb7a0cee356b8d7e7079b1da54aaff2dfd99b7fefe8e97fffdecb91e
